Question

A current of 0.001 A can be felt by the human body. 0.005 A can produce a pain response. 0.015 A can cause a loss of muscle control. In the procedures of this lesson, over 0.030 A of current traveled in the three-battery circuit. Why was this circuit safe to handle with dry hands? Include the resistance of human skin in your answer.

Answer 1

Answer :

Given:

• A current can be felt by the human body = 0.001 A
• A current can produce a pain response = 0.005 A
• A current causes to a loss of muscle control = 0.015 A
• current traveled in the three-battery circuit = 0.030 A

solution:

current traveled in the three-battery circuit ( 0.030 A ) > A current causes to a loss of muscle control (0.015 A )

Dry skin has very high resistance Resistance. (approximately 100,000 ohms)

wet skin has low Resistance. (approximately 1000 ohms or less )

current always takes the lower resistance path. ( current is inversely proportional to resistance)

dry skin has very high resistance and lower current flow.

wet skin has low resistance and higher current flow.

so it safe to handle to handle the circuit with dry hand because the lesser current will flow through body.